In my personal opinion, BING = Bing Is Not Google (to continue the tradition of recursive acronyms)
And it’s true. Bing attempts to be a decision engine, not just another search engine.
It is interesting that Google itself has an “I’m feeling Lucky” button, but using it simply means that you let the search engine make the decision for you. True, in some cases, this is good enough – but as a former Google user I don’t recollect using that button too much. I much prefer drilling into the results myself.